A reddish-bronze mineral consisting of iron sulfide, typically forming massive or granular deposits.
- Microcrystals of pyrrhotite, goethite, pyrite, galena, and calcite are found on the dumps.
- We have also seen several specimens in which pyrite has replaced a hexagonal mineral that was probably pyrrhotite.
- Secondary titanite, chlorite, white mica and pyrrhotite are abundant, and some samples contain metamorphic biotite.
Mid 19th century: from Greek purrhotēs 'redness' + -ite1.
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